.whiteboard-zone{
    box-sizing: border-box;
    margin: 10px;
    height: calc(100% - 20px);
    background: rgb(240, 240, 240);

    .wb-viewer{
        width: 100%;
        height: 100%;
        border: 1px solid #dbdbdb;
        box-sizing: border-box;
        overflow: hidden;
        background: white;
        position: relative;

        .app-controller {
            position: absolute;
            z-index: 100;
            top: 0;
            right: 170px;
        }
    }
}
